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Traffic Report on 13 November '18

Twenty objects reported inside ten LD

Twenty visitors at less than ten lunar distances (LD) from our planet are being tracked today. Risk-listed intruder 2018 VC7 is the nearest, and passes the Earth at 0.87 LD and the Moon at 1.08 LD, while 2018 VN6 leaves Earth's sphere of gravitational influence, traveling out from 2.05 to 4.45 LD.

This report was generated at 1934 UTC with the discovery of just departed risk-listed 2018 VA8 (MPEC), which flew by us at 2.98 LD on November 9th. Today's DOU MPEC has follow-up for five objects active in the traffic tables here and for three departed objects: 2018 VM6 and risk-listed 2018 VS6 and 2018 TY4.

Notes: Ten times the distance to the Moon (ten LD) has no astronomical importance but is a useful boundary for reporting about transient natural objects that approach our planet's gravitational sphere of influence (SOI), which has a radius of about 2.41 LD from Earth's center. This puts a focus on some of the most important and very best NEO observation work, representative of the much larger NEO discovery and tracking effort. Object temporal distances are derived by A/CC from JPL Horizons data. See also current sky chart and object details (alt-details), ephemerides, and today's timeline.

NEOCP Activity on 13 November '18

The MPC's NEO Confirmation Page has 69 listings

When last checked at 2358 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had 69 objects listed. Of these, 30 were "one nighters." So far The Tracking News has counted a total of 80 listings on the NEOCP today.

Impact Risk Monitoring on 13 November '18

Summary Risk Table for Risk Assessments Updated Today (last checks: NEODyS at 2358 UTC)
See the CRT page for a list of all objects rated recently as risks and our ephemerides page for a list of risk-listed objects under current observation.
The time horizon for JPL and NEODyS listings is 100 years, and both post impact solutions beyond that for some special objects.
For the latest official risk assessments, and for explanations of the terminology, see the NASA/JPL Sentry and NEODyS CLOMON2 risk pages.

0000NNN000

Object

RiskMonitor

WhenNotedUTC

0000T0000YearRange

VI#

000NN00ProbCum

T0000PSCum

T0000PSMax

TS

Notes for Today's Latest Risk Assessments

2018 VA8

JPL Sentry

1802

2098-2116

38

2.42343429e-05

-5.76

-6.27

0

JPL: Computed at 09:35 today Pacific time based on 23 observations spanning 1.0323 days (2018-Nov-12.28874 to 2018-Nov-13.32103). Diameter approximately 0.014 km. from weighted mean H=26.89.

2018 VS6

JPL Sentry

1710

2083-2118

19

0.000277324373

-4.58

-4.66

0

JPL: Computed at 07:06 today Pacific time based on 64 observations spanning 3.1259 days (2018-Nov-09.544497 to 2018-Nov-12.67042). Diameter approximately 0.014 km. from weighted mean H=26.88.

2018 TY4

JPL Sentry

1710

2033-2033

1

3.134e-04

-4.51

-4.51

0

JPL: Computed at 06:57 today Pacific time based on 23 observations spanning 30.849 days (2018-Oct-10.29667 to 2018-Nov-10.145307). Diameter approximately 0.008 km. from weighted mean H=28.12.

2010 VP139

JPL Sentry

1710

2019-2116

386

1.39132249e-05

-6.53

-7.86

0

JPL: Computed at 15:22 April 7th of 2017 Pacific time based on 12 observations spanning .04588 days (2010-Nov-14.27911 to 2010-Nov-14.32499). Diameter approximately 0.006 km. from weighted mean H=28.60.

2009 VZ39

JPL Sentry

1710

2018-2116

909

7.071014e-06

-6.23

-7.60

0

JPL: Computed at 11:17 April 7th of 2017 Pacific time based on 8 observations spanning .04342 days (2009-Nov-10.27204 to 2009-Nov-10.31546). Diameter approximately 0.009 km. from weighted mean H=27.89.

An impact solution, also known as a "virtual impactor" (VI), is not a prediction but rather a possibility derived from a variant orbit calculation that cannot be eliminated yet based on the existing data. Elimination can come quickly with just a little further observation or may take weeks or months, sometimes years. Once superceded or eliminated, a former impact solution has zero relevance to an object's risk. See Jon Giorgini's "Understanding Risk Pages" to learn more.